163763645 has 18 divisors (see below), whose sum is σ = 201985722. Its totient is φ = 127462656.

The previous prime is 163763629. The next prime is 163763653. The reversal of 163763645 is 546367361.

It can be written as a sum of positive squares in 3 ways, for example, as 11710084 + 152053561 = 3422^2 + 12331^2 .

It is not a de Polignac number, because 163763645 - 2⁴ = 163763629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1688237 + ... + 1688333.

It is an arithmetic number, because the mean of its divisors is an integer number (11221429).

Almost surely, 2^163763645 is an apocalyptic number.

It is an amenable number.

163763645 is a deficient number, since it is larger than the sum of its proper divisors (38222077).

163763645 is an frugal number, since it uses more digits than its factorization.

163763645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 161 counting only the distinct ones).

The product of its digits is 272160, while the sum is 41.

The square root of 163763645 is about 12797.0170352313. The cubic root of 163763645 is about 547.1072863342.

The spelling of 163763645 in words is "one hundred sixty-three million, seven hundred sixty-three thousand, six hundred forty-five".